Ground-clamp.



L. B. ABBOTT. GROUND CLAMP. APXLIGAT0N FILED JULY 25 (911.

Pafiented Decl 29,1914.

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wan-co ":Ilfliill B. ABBC'TT. OF BHIDGEPORT, CONNECTIG'T.

3R0 UN! CLAMP.

Application filed July 25, 1911.

[ iii Lr/imn "it may concern to it known that 1, Lin): B. ABBOTT, a citizen of the l mited States, residing at Bridgeport, in the county of Fairfield and f tmic of (,minerticiu, have invented a new um] useful Ground-Clamp, of which the foihw ng is n specifimtion.

.\I "invention relates to improvemenw in clumps for uttnching electric wires to pipes, etc, for the purpose of gmunding said electric Wires. 7

The objects of in improvements are:

First, to provide a clamp which may be quickly and easily applied without the remowil of nuts or bolts which are frequently dropped or lost. Second; to provide means of securing various sizes of wire without the use of solder. Third; to provide a clamp without projecting screws or nuts which are likely to become caught and darn aged. Fourth; to provide means of easy ad ustment to overcome variation in size of pipes undwires With these and other objects in view,

which will be readily apparent to those skilled in the art, my invention consists of the novel construction, Combination and arrangement of parts hereinafter more fully described, illustrated and claimed.

While susceptible to embodiment in Va rious was by the use of different Incchani- Ciil equivalents, my invention is well exemplified by the form shown in the accompanying drawings. in which;

Figure l is a side view of my-clamp as applied to a pipe and shows the manner, of holding the Wire therein Fig. I] is a vertical. section taken through C-D in Fig. I looking in the direction of the arrows.

Fig. III is an end view of my clamw be fore being applied to the pipe. This ows one arrangement of the flexible clamping strap 17. the two ends of the strap bein over the tightening slide and the centra portion of the strap bearing upon the. pipe. This same arrangement is perhaps more clearly shown in l H Fig. V is n top view if the ti htening slide *3. This shows the tappe hole 0 through which the tightening screw 4 acts. It also sho s the slots 10 which guide the movemert of this part in the rectangular openings, 11 and 11" in part 1. These Specification of Letters Patent.

Patented Dec. 29, 1914-.

Serial No. 840,510.

slot-s also not to prevent the spreading apart of the supporting member 1., when the pressure of the screw is a plied.

Fig. V is on end vView of tie flexible clumping strap 3 showing another arrange-- ment of the some, i. c. the central portion us well as the two ends being over the tightening slide. This is the preferred form although the two ends may be folded outside the central portion with equoily good results.

Fig. VI. is an end view of the flexible clamping" strap 3, showing still another an rangement of the same, i. c. the central portion of the strap only being over the tight ening slide, the two ends arranged to only partially encircle the pipe.

Fig. \"Il is a. view of the supporting part 1, shown in perspective. This shows the central hole 7 through which the screw 4 passes freely, the adjacent metal support ing the head of the screw. The, rectangular openings 11 and 11 receive the tightening slide and cooperate with. the slots .10 in guiding its movement. i The bottom of this supporting part is curved as at 12 and 12 to more nearly tit-the curvature of the pipe.

Fig. VIII is a bottom View of the flexible clamping strap 3. This shows the hole 8 through which the tightening screw passes. This hole may be both in the middle of the strap and in both ends, as shown in Fig. V. Or it may be only in the ends of the strap as" arranged in Figs. H and III. Or it may be only in the central portion of the strn as arranged in Fig. VI. This figure a. so shows the 100 s 14 and the eer: 13 which are for-me at the bottom of the flexible st ap. These loops 14 interlap through the intervening spaces 13 and form a tuhelike opening in which. the wire 6 is inserted.

The action of the clamp is as follows: The clamp is first placed upon the pipe, the curved portion of the supporting port 12 and 12' resting against the pipe and a leg of the flexible strap on each side of the pipe. The ends of these legs are then broughttogether and the ground wire. is inserted in the tubelike opening formed by the inter-lapping of the loo in the ends of the strap. The screw" is then tightened, this raises the tightening slide which in turn raises the top of the flexible strap.

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